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annotate VMS.c @ 180:3b67317d2e3f

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cloned the sub-repositories (DynArray, Hash_impl, etc) now committing the clones
author Me@portablequad
date Wed, 04 Jan 2012 16:29:11 -0800
parents b86c54dfb19f
children d7c0c0a8187a 7523ee70d66c 6db9e4898978
rev   line source
Me@0 1 /*
Me@38 2 * Copyright 2010 OpenSourceStewardshipFoundation
Me@0 3 *
Me@0 4 * Licensed under BSD
Me@0 5 */
Me@0 6
Me@0 7 #include <stdio.h>
Me@0 8 #include <stdlib.h>
Me@50 9 #include <string.h>
Me@0 10 #include <malloc.h>
msach@76 11 #include <inttypes.h>
Me@50 12 #include <sys/time.h>
Me@0 13
Me@0 14 #include "VMS.h"
msach@77 15 #include "ProcrContext.h"
Me@0 16 #include "Queue_impl/BlockingQueue.h"
Me@38 17 #include "Histogram/Histogram.h"
Me@0 18
Me@0 19
Me@26 20 #define thdAttrs NULL
Me@26 21
Me@22 22 //===========================================================================
Me@22 23 void
Me@22 24 shutdownFn( void *dummy, VirtProcr *dummy2 );
Me@22 25
Me@31 26 SchedSlot **
Me@31 27 create_sched_slots();
Me@22 28
Me@28 29 void
Me@28 30 create_masterEnv();
Me@28 31
Me@28 32 void
Me@28 33 create_the_coreLoop_OS_threads();
Me@28 34
Me@50 35 MallocProlog *
Me@50 36 create_free_list();
Me@50 37
Me@53 38 void
Me@53 39 endOSThreadFn( void *initData, VirtProcr *animatingPr );
Me@50 40
Me@26 41 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
Me@26 42 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
Me@26 43
Me@22 44 //===========================================================================
Me@22 45
Me@0 46 /*Setup has two phases:
Me@0 47 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
Me@8 48 * the master virt procr into the work-queue, ready for first "call"
Me@8 49 * 2) Semantic layer then does its own init, which creates the seed virt
Me@8 50 * procr inside the semantic layer, ready to schedule it when
Me@0 51 * asked by the first run of the masterLoop.
Me@0 52 *
Me@0 53 *This part is bit weird because VMS really wants to be "always there", and
Me@0 54 * have applications attach and detach.. for now, this VMS is part of
Me@0 55 * the app, so the VMS system starts up as part of running the app.
Me@0 56 *
Me@8 57 *The semantic layer is isolated from the VMS internals by making the
Me@8 58 * semantic layer do setup to a state that it's ready with its
Me@8 59 * initial virt procrs, ready to schedule them to slots when the masterLoop
Me@0 60 * asks. Without this pattern, the semantic layer's setup would
Me@8 61 * have to modify slots directly to assign the initial virt-procrs, and put
Me@31 62 * them into the readyToAnimateQ itself, breaking the isolation completely.
Me@0 63 *
Me@0 64 *
Me@8 65 *The semantic layer creates the initial virt procr(s), and adds its
Me@8 66 * own environment to masterEnv, and fills in the pointers to
Me@0 67 * the requestHandler and slaveScheduler plug-in functions
Me@8 68 */
Me@8 69
Me@8 70 /*This allocates VMS data structures, populates the master VMSProc,
Me@0 71 * and master environment, and returns the master environment to the semantic
Me@0 72 * layer.
Me@0 73 */
Me@8 74 void
Me@8 75 VMS__init()
Me@28 76 {
Me@28 77 create_masterEnv();
Me@28 78 create_the_coreLoop_OS_threads();
Me@28 79 }
Me@28 80
msach@71 81 #ifdef SEQUENTIAL
msach@71 82
Me@28 83 /*To initialize the sequential version, just don't create the threads
Me@28 84 */
Me@28 85 void
Me@28 86 VMS__init_Seq()
Me@28 87 {
Me@28 88 create_masterEnv();
Me@28 89 }
Me@28 90
msach@71 91 #endif
msach@71 92
Me@28 93 void
Me@28 94 create_masterEnv()
Me@31 95 { MasterEnv *masterEnv;
Me@55 96 VMSQueueStruc **readyToAnimateQs;
Me@31 97 int coreIdx;
Me@31 98 VirtProcr **masterVPs;
Me@31 99 SchedSlot ***allSchedSlots; //ptr to array of ptrs
Me@53 100
Me@53 101
Me@31 102 //Make the master env, which holds everything else
Me@1 103 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
Me@53 104
Me@53 105 //Very first thing put into the master env is the free-list, seeded
Me@53 106 // with a massive initial chunk of memory.
Me@53 107 //After this, all other mallocs are VMS__malloc.
Me@53 108 _VMSMasterEnv->freeListHead = VMS_ext__create_free_list();
Me@53 109
Me@65 110
Me@65 111 //============================= MEASUREMENT STUFF ========================
Me@65 112 #ifdef MEAS__TIME_MALLOC
msach@160 113 _VMSMasterEnv->mallocTimeHist = makeFixedBinHistExt( 100, 0, 30,
msach@79 114 "malloc_time_hist");
msach@160 115 _VMSMasterEnv->freeTimeHist = makeFixedBinHistExt( 100, 0, 30,
msach@79 116 "free_time_hist");
Me@65 117 #endif
Me@68 118 #ifdef MEAS__TIME_PLUGIN
msach@160 119 _VMSMasterEnv->reqHdlrLowTimeHist = makeFixedBinHistExt( 100, 0, 200,
msach@79 120 "plugin_low_time_hist");
msach@160 121 _VMSMasterEnv->reqHdlrHighTimeHist = makeFixedBinHistExt( 100, 0, 200,
msach@79 122 "plugin_high_time_hist");
Me@68 123 #endif
Me@65 124 //========================================================================
Me@65 125
Me@53 126 //===================== Only VMS__malloc after this ====================
msach@69 127 masterEnv = (MasterEnv*)_VMSMasterEnv;
Me@31 128
Me@31 129 //Make a readyToAnimateQ for each core loop
Me@55 130 readyToAnimateQs = VMS__malloc( NUM_CORES * sizeof(VMSQueueStruc *) );
Me@53 131 masterVPs = VMS__malloc( NUM_CORES * sizeof(VirtProcr *) );
Me@0 132
Me@31 133 //One array for each core, 3 in array, core's masterVP scheds all
Me@53 134 allSchedSlots = VMS__malloc( NUM_CORES * sizeof(SchedSlot *) );
Me@0 135
Me@53 136 _VMSMasterEnv->numProcrsCreated = 0; //used by create procr
Me@31 137 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@53 138 {
Me@55 139 readyToAnimateQs[ coreIdx ] = makeVMSQ();
Me@31 140
Me@50 141 //Q: should give masterVP core-specific info as its init data?
msach@76 142 masterVPs[ coreIdx ] = VMS__create_procr( (VirtProcrFnPtr)&masterLoop, (void*)masterEnv );
Me@31 143 masterVPs[ coreIdx ]->coreAnimatedBy = coreIdx;
Me@31 144 allSchedSlots[ coreIdx ] = create_sched_slots(); //makes for one core
Me@53 145 _VMSMasterEnv->numMasterInARow[ coreIdx ] = 0;
Me@55 146 _VMSMasterEnv->workStealingGates[ coreIdx ] = NULL;
Me@31 147 }
Me@31 148 _VMSMasterEnv->readyToAnimateQs = readyToAnimateQs;
Me@31 149 _VMSMasterEnv->masterVPs = masterVPs;
Me@50 150 _VMSMasterEnv->masterLock = UNLOCKED;
Me@31 151 _VMSMasterEnv->allSchedSlots = allSchedSlots;
Me@55 152 _VMSMasterEnv->workStealingLock = UNLOCKED;
Me@28 153
Me@12 154
Me@31 155 //Aug 19, 2010: no longer need to place initial masterVP into queue
Me@31 156 // because coreLoop now controls -- animates its masterVP when no work
Me@31 157
Me@30 158
Me@50 159 //============================= MEASUREMENT STUFF ========================
Me@50 160 #ifdef STATS__TURN_ON_PROBES
Me@50 161 _VMSMasterEnv->dynIntervalProbesInfo =
msach@69 162 makePrivDynArrayOfSize( (void***)&(_VMSMasterEnv->intervalProbes), 200);
Me@30 163
Me@53 164 _VMSMasterEnv->probeNameHashTbl = makeHashTable( 1000, &VMS__free );
Me@53 165
Me@53 166 //put creation time directly into master env, for fast retrieval
Me@50 167 struct timeval timeStamp;
Me@50 168 gettimeofday( &(timeStamp), NULL);
Me@50 169 _VMSMasterEnv->createPtInSecs =
Me@50 170 timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0);
Me@50 171 #endif
Me@65 172 #ifdef MEAS__TIME_MASTER_LOCK
Me@65 173 _VMSMasterEnv->masterLockLowTimeHist = makeFixedBinHist( 50, 0, 2,
Me@65 174 "master lock low time hist");
Me@68 175 _VMSMasterEnv->masterLockHighTimeHist = makeFixedBinHist( 50, 0, 100,
Me@65 176 "master lock high time hist");
Me@65 177 #endif
Me@68 178
msach@76 179 MakeTheMeasHists();
Me@50 180 //========================================================================
Me@38 181
Me@0 182 }
Me@0 183
Me@31 184 SchedSlot **
Me@31 185 create_sched_slots()
Me@31 186 { SchedSlot **schedSlots;
Me@0 187 int i;
Me@0 188
Me@53 189 schedSlots = VMS__malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
Me@8 190
Me@1 191 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@0 192 {
Me@53 193 schedSlots[i] = VMS__malloc( sizeof(SchedSlot) );
Me@8 194
Me@1 195 //Set state to mean "handling requests done, slot needs filling"
Me@8 196 schedSlots[i]->workIsDone = FALSE;
Me@8 197 schedSlots[i]->needsProcrAssigned = TRUE;
Me@0 198 }
Me@31 199 return schedSlots;
Me@31 200 }
Me@31 201
Me@31 202
Me@31 203 void
Me@31 204 freeSchedSlots( SchedSlot **schedSlots )
Me@31 205 { int i;
Me@31 206 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@31 207 {
Me@53 208 VMS__free( schedSlots[i] );
Me@31 209 }
Me@53 210 VMS__free( schedSlots );
Me@0 211 }
Me@0 212
Me@8 213
Me@28 214 void
Me@28 215 create_the_coreLoop_OS_threads()
Me@28 216 {
Me@28 217 //========================================================================
Me@28 218 // Create the Threads
Me@28 219 int coreIdx, retCode;
Me@28 220
Me@28 221 //Need the threads to be created suspended, and wait for a signal
Me@28 222 // before proceeding -- gives time after creating to initialize other
Me@28 223 // stuff before the coreLoops set off.
Me@28 224 _VMSMasterEnv->setupComplete = 0;
Me@28 225
Me@28 226 //Make the threads that animate the core loops
Me@28 227 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@53 228 { coreLoopThdParams[coreIdx] = VMS__malloc( sizeof(ThdParams) );
Me@28 229 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
Me@28 230
Me@28 231 retCode =
Me@28 232 pthread_create( &(coreLoopThdHandles[coreIdx]),
Me@28 233 thdAttrs,
Me@28 234 &coreLoop,
Me@28 235 (void *)(coreLoopThdParams[coreIdx]) );
Me@50 236 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(1);}
Me@28 237 }
Me@28 238 }
Me@28 239
Me@0 240 /*Semantic layer calls this when it want the system to start running..
Me@0 241 *
Me@24 242 *This starts the core loops running then waits for them to exit.
Me@0 243 */
Me@12 244 void
Me@24 245 VMS__start_the_work_then_wait_until_done()
Me@12 246 { int coreIdx;
Me@24 247 //Start the core loops running
Me@25 248
Me@25 249 //tell the core loop threads that setup is complete
Me@25 250 //get lock, to lock out any threads still starting up -- they'll see
Me@25 251 // that setupComplete is true before entering while loop, and so never
Me@25 252 // wait on the condition
Me@26 253 pthread_mutex_lock( &suspendLock );
Me@25 254 _VMSMasterEnv->setupComplete = 1;
Me@26 255 pthread_mutex_unlock( &suspendLock );
Me@26 256 pthread_cond_broadcast( &suspend_cond );
Me@25 257
Me@25 258
Me@24 259 //wait for all to complete
Me@8 260 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@8 261 {
Me@25 262 pthread_join( coreLoopThdHandles[coreIdx], NULL );
Me@24 263 }
Me@25 264
Me@24 265 //NOTE: do not clean up VMS env here -- semantic layer has to have
Me@24 266 // a chance to clean up its environment first, then do a call to free
Me@24 267 // the Master env and rest of VMS locations
Me@8 268 }
Me@0 269
msach@70 270 #ifdef SEQUENTIAL
Me@28 271 /*Only difference between version with an OS thread pinned to each core and
Me@28 272 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
Me@28 273 */
Me@28 274 void
Me@28 275 VMS__start_the_work_then_wait_until_done_Seq()
Me@28 276 {
Me@28 277 //Instead of un-suspending threads, just call the one and only
Me@28 278 // core loop (sequential version), in the main thread.
Me@28 279 coreLoop_Seq( NULL );
msach@75 280 flushRegisters();
Me@28 281
Me@28 282 }
msach@70 283 #endif
Me@28 284
Me@50 285 inline VirtProcr *
Me@50 286 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
Me@50 287 { VirtProcr *newPr;
msach@76 288 void *stackLocs;
Me@50 289
Me@50 290 newPr = VMS__malloc( sizeof(VirtProcr) );
Me@50 291 stackLocs = VMS__malloc( VIRT_PROCR_STACK_SIZE );
Me@50 292 if( stackLocs == 0 )
Me@50 293 { perror("VMS__malloc stack"); exit(1); }
Me@50 294
msach@69 295 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
Me@50 296 }
Me@50 297
Me@50 298 /* "ext" designates that it's for use outside the VMS system -- should only
Me@50 299 * be called from main thread or other thread -- never from code animated by
Me@50 300 * a VMS virtual processor.
Me@50 301 */
Me@50 302 inline VirtProcr *
Me@50 303 VMS_ext__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
Me@50 304 { VirtProcr *newPr;
Me@50 305 char *stackLocs;
Me@50 306
Me@50 307 newPr = malloc( sizeof(VirtProcr) );
Me@50 308 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
Me@50 309 if( stackLocs == 0 )
Me@50 310 { perror("malloc stack"); exit(1); }
Me@50 311
msach@69 312 return create_procr_helper( newPr, fnPtr, initialData, stackLocs );
Me@50 313 }
Me@50 314
Me@8 315
Me@64 316 /*Anticipating multi-tasking
Me@64 317 */
Me@64 318 void *
Me@64 319 VMS__give_sem_env_for( VirtProcr *animPr )
Me@64 320 {
Me@64 321 return _VMSMasterEnv->semanticEnv;
Me@64 322 }
Me@64 323 //===========================================================================
Me@26 324 /*there is a label inside this function -- save the addr of this label in
Me@0 325 * the callingPr struc, as the pick-up point from which to start the next
Me@0 326 * work-unit for that procr. If turns out have to save registers, then
Me@0 327 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
Me@0 328 * "done with work-unit" label. The procr struc is in the request in the
Me@0 329 * slave that animated the just-ended work-unit, so all the state is saved
Me@0 330 * there, and will get passed along, inside the request handler, to the
Me@0 331 * next work-unit for that procr.
Me@0 332 */
Me@8 333 void
Me@38 334 VMS__suspend_procr( VirtProcr *animatingPr )
Me@55 335 {
Me@30 336
Me@30 337 //The request to master will cause this suspended virt procr to get
Me@30 338 // scheduled again at some future point -- to resume, core loop jumps
Me@30 339 // to the resume point (below), which causes restore of saved regs and
Me@30 340 // "return" from this call.
msach@71 341 //animatingPr->nextInstrPt = &&ResumePt;
Me@30 342
Me@30 343 //return ownership of the virt procr and sched slot to Master virt pr
Me@38 344 animatingPr->schedSlot->workIsDone = TRUE;
Me@1 345
Me@41 346 //=========================== Measurement stuff ========================
Me@38 347 #ifdef MEAS__TIME_STAMP_SUSP
Me@41 348 //record time stamp: compare to time-stamp recorded below
Me@38 349 saveLowTimeStampCountInto( animatingPr->preSuspTSCLow );
Me@38 350 #endif
Me@41 351 //=======================================================================
Me@30 352
msach@71 353 switchToCoreLoop(animatingPr);
msach@71 354 flushRegisters();
Me@55 355
Me@55 356 //=======================================================================
Me@30 357
Me@38 358 #ifdef MEAS__TIME_STAMP_SUSP
Me@41 359 //NOTE: only take low part of count -- do sanity check when take diff
Me@38 360 saveLowTimeStampCountInto( animatingPr->postSuspTSCLow );
Me@38 361 #endif
Me@30 362
Me@0 363 return;
Me@0 364 }
Me@0 365
Me@22 366
Me@22 367
Me@50 368 /*For this implementation of VMS, it may not make much sense to have the
Me@50 369 * system of requests for creating a new processor done this way.. but over
Me@50 370 * the scope of single-master, multi-master, mult-tasking, OS-implementing,
Me@50 371 * distributed-memory, and so on, this gives VMS implementation a chance to
Me@50 372 * do stuff before suspend, in the AppVP, and in the Master before the plugin
Me@50 373 * is called, as well as in the lang-lib before this is called, and in the
Me@50 374 * plugin. So, this gives both VMS and language implementations a chance to
Me@50 375 * intercept at various points and do order-dependent stuff.
Me@50 376 *Having a standard VMSNewPrReqData struc allows the language to create and
Me@50 377 * free the struc, while VMS knows how to get the newPr if it wants it, and
Me@50 378 * it lets the lang have lang-specific data related to creation transported
Me@50 379 * to the plugin.
Me@50 380 */
Me@50 381 void
Me@50 382 VMS__send_create_procr_req( void *semReqData, VirtProcr *reqstingPr )
Me@50 383 { VMSReqst req;
Me@50 384
Me@50 385 req.reqType = createReq;
Me@50 386 req.semReqData = semReqData;
Me@50 387 req.nextReqst = reqstingPr->requests;
Me@50 388 reqstingPr->requests = &req;
Me@50 389
Me@50 390 VMS__suspend_procr( reqstingPr );
Me@50 391 }
Me@50 392
Me@22 393
Me@38 394 /*
Me@22 395 *This adds a request to dissipate, then suspends the processor so that the
Me@22 396 * request handler will receive the request. The request handler is what
Me@22 397 * does the work of freeing memory and removing the processor from the
Me@22 398 * semantic environment's data structures.
Me@22 399 *The request handler also is what figures out when to shutdown the VMS
Me@22 400 * system -- which causes all the core loop threads to die, and returns from
Me@22 401 * the call that started up VMS to perform the work.
Me@22 402 *
Me@22 403 *This form is a bit misleading to understand if one is trying to figure out
Me@22 404 * how VMS works -- it looks like a normal function call, but inside it
Me@22 405 * sends a request to the request handler and suspends the processor, which
Me@22 406 * jumps out of the VMS__dissipate_procr function, and out of all nestings
Me@22 407 * above it, transferring the work of dissipating to the request handler,
Me@22 408 * which then does the actual work -- causing the processor that animated
Me@22 409 * the call of this function to disappear and the "hanging" state of this
Me@22 410 * function to just poof into thin air -- the virtual processor's trace
Me@22 411 * never returns from this call, but instead the virtual processor's trace
Me@22 412 * gets suspended in this call and all the virt processor's state disap-
Me@22 413 * pears -- making that suspend the last thing in the virt procr's trace.
Me@8 414 */
Me@8 415 void
Me@53 416 VMS__send_dissipate_req( VirtProcr *procrToDissipate )
Me@50 417 { VMSReqst req;
Me@22 418
Me@50 419 req.reqType = dissipate;
Me@50 420 req.nextReqst = procrToDissipate->requests;
Me@50 421 procrToDissipate->requests = &req;
Me@50 422
Me@22 423 VMS__suspend_procr( procrToDissipate );
Me@50 424 }
Me@50 425
Me@50 426
Me@50 427 /* "ext" designates that it's for use outside the VMS system -- should only
Me@50 428 * be called from main thread or other thread -- never from code animated by
Me@50 429 * a VMS virtual processor.
Me@50 430 *
Me@50 431 *Use this version to dissipate VPs created outside the VMS system.
Me@50 432 */
Me@50 433 void
Me@50 434 VMS_ext__dissipate_procr( VirtProcr *procrToDissipate )
Me@50 435 {
Me@50 436 //NOTE: initialData was given to the processor, so should either have
Me@50 437 // been alloc'd with VMS__malloc, or freed by the level above animPr.
Me@50 438 //So, all that's left to free here is the stack and the VirtProcr struc
Me@50 439 // itself
Me@50 440 //Note, should not stack-allocate initial data -- no guarantee, in
Me@50 441 // general that creating processor will outlive ones it creates.
Me@50 442 free( procrToDissipate->startOfStack );
Me@50 443 free( procrToDissipate );
Me@50 444 }
Me@50 445
Me@22 446
Me@22 447
Me@53 448 /*This call's name indicates that request is malloc'd -- so req handler
Me@53 449 * has to free any extra requests tacked on before a send, using this.
Me@53 450 *
Me@53 451 * This inserts the semantic-layer's request data into standard VMS carrier
Me@53 452 * request data-struct that is mallocd. The sem request doesn't need to
Me@53 453 * be malloc'd if this is called inside the same call chain before the
Me@53 454 * send of the last request is called.
Me@53 455 *
Me@53 456 *The request handler has to call VMS__free_VMSReq for any of these
Me@22 457 */
Me@22 458 inline void
Me@53 459 VMS__add_sem_request_in_mallocd_VMSReqst( void *semReqData,
Me@53 460 VirtProcr *callingPr )
Me@53 461 { VMSReqst *req;
Me@22 462
Me@53 463 req = VMS__malloc( sizeof(VMSReqst) );
Me@53 464 req->reqType = semantic;
Me@53 465 req->semReqData = semReqData;
Me@53 466 req->nextReqst = callingPr->requests;
Me@53 467 callingPr->requests = req;
Me@22 468 }
Me@22 469
Me@50 470 /*This inserts the semantic-layer's request data into standard VMS carrier
Me@50 471 * request data-struct is allocated on stack of this call & ptr to it sent
Me@50 472 * to plugin
Me@50 473 *Then it does suspend, to cause request to be sent.
Me@50 474 */
Me@50 475 inline void
Me@50 476 VMS__send_sem_request( void *semReqData, VirtProcr *callingPr )
Me@50 477 { VMSReqst req;
Me@22 478
Me@50 479 req.reqType = semantic;
Me@50 480 req.semReqData = semReqData;
Me@50 481 req.nextReqst = callingPr->requests;
Me@50 482 callingPr->requests = &req;
Me@50 483
Me@50 484 VMS__suspend_procr( callingPr );
Me@50 485 }
Me@50 486
Me@50 487
Me@50 488 inline void
Me@50 489 VMS__send_VMSSem_request( void *semReqData, VirtProcr *callingPr )
Me@50 490 { VMSReqst req;
Me@50 491
Me@50 492 req.reqType = VMSSemantic;
Me@50 493 req.semReqData = semReqData;
Me@50 494 req.nextReqst = callingPr->requests; //gab any other preceeding
Me@50 495 callingPr->requests = &req;
Me@50 496
Me@50 497 VMS__suspend_procr( callingPr );
Me@50 498 }
Me@50 499
Me@50 500
Me@50 501 /*
Me@38 502 */
Me@24 503 VMSReqst *
Me@50 504 VMS__take_next_request_out_of( VirtProcr *procrWithReq )
Me@31 505 { VMSReqst *req;
Me@31 506
Me@31 507 req = procrWithReq->requests;
Me@38 508 if( req == NULL ) return NULL;
Me@31 509
Me@31 510 procrWithReq->requests = procrWithReq->requests->nextReqst;
Me@50 511 return req;
Me@24 512 }
Me@22 513
Me@24 514
Me@24 515 inline void *
Me@24 516 VMS__take_sem_reqst_from( VMSReqst *req )
Me@24 517 {
Me@24 518 return req->semReqData;
Me@24 519 }
Me@24 520
Me@24 521
Me@24 522
Me@50 523 /* This is for OS requests and VMS infrastructure requests, such as to create
Me@50 524 * a probe -- a probe is inside the heart of VMS-core, it's not part of any
Me@50 525 * language -- but it's also a semantic thing that's triggered from and used
Me@50 526 * in the application.. so it crosses abstractions.. so, need some special
Me@50 527 * pattern here for handling such requests.
Me@52 528 * Doing this just like it were a second language sharing VMS-core.
Me@52 529 *
Me@50 530 * This is called from the language's request handler when it sees a request
Me@50 531 * of type VMSSemReq
Me@52 532 *
Me@52 533 * TODO: Later change this, to give probes their own separate plugin & have
Me@52 534 * VMS-core steer the request to appropriate plugin
Me@52 535 * Do the same for OS calls -- look later at it..
Me@50 536 */
Me@50 537 void inline
Me@50 538 VMS__handle_VMSSemReq( VMSReqst *req, VirtProcr *requestingPr, void *semEnv,
Me@50 539 ResumePrFnPtr resumePrFnPtr )
Me@50 540 { VMSSemReq *semReq;
Me@50 541 IntervalProbe *newProbe;
Me@24 542
Me@50 543 semReq = req->semReqData;
Me@24 544
Me@50 545 newProbe = VMS__malloc( sizeof(IntervalProbe) );
Me@65 546 newProbe->nameStr = VMS__strDup( semReq->nameStr );
Me@50 547 newProbe->hist = NULL;
Me@50 548 newProbe->schedChoiceWasRecorded = FALSE;
Me@53 549
Me@53 550 //This runs in masterVP, so no race-condition worries
Me@50 551 newProbe->probeID =
Me@50 552 addToDynArray( newProbe, _VMSMasterEnv->dynIntervalProbesInfo );
Me@50 553
Me@53 554 requestingPr->dataRetFromReq = newProbe;
Me@50 555
Me@50 556 (*resumePrFnPtr)( requestingPr, semEnv );
Me@22 557 }
Me@22 558
Me@22 559
Me@22 560
Me@24 561 /*This must be called by the request handler plugin -- it cannot be called
Me@24 562 * from the semantic library "dissipate processor" function -- instead, the
Me@50 563 * semantic layer has to generate a request, and the plug-in calls this
Me@24 564 * function.
Me@24 565 *The reason is that this frees the virtual processor's stack -- which is
Me@24 566 * still in use inside semantic library calls!
Me@24 567 *
Me@24 568 *This frees or recycles all the state owned by and comprising the VMS
Me@24 569 * portion of the animating virtual procr. The request handler must first
Me@24 570 * free any semantic data created for the processor that didn't use the
Me@24 571 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
Me@24 572 * system to disown any state that did use VMS_malloc, and then frees the
Me@24 573 * statck and the processor-struct itself.
Me@24 574 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
Me@24 575 * state, then that state gets freed (or sent to recycling) as a side-effect
Me@24 576 * of dis-owning it.
Me@24 577 */
Me@24 578 void
Me@53 579 VMS__dissipate_procr( VirtProcr *animatingPr )
Me@24 580 {
Me@24 581 //dis-own all locations owned by this processor, causing to be freed
Me@24 582 // any locations that it is (was) sole owner of
Me@29 583 //TODO: implement VMS__malloc system, including "give up ownership"
Me@24 584
Me@24 585
Me@24 586 //NOTE: initialData was given to the processor, so should either have
Me@24 587 // been alloc'd with VMS__malloc, or freed by the level above animPr.
Me@24 588 //So, all that's left to free here is the stack and the VirtProcr struc
Me@24 589 // itself
Me@50 590 //Note, should not stack-allocate initial data -- no guarantee, in
Me@50 591 // general that creating processor will outlive ones it creates.
Me@50 592 VMS__free( animatingPr->startOfStack );
Me@50 593 VMS__free( animatingPr );
Me@24 594 }
Me@24 595
Me@24 596
Me@53 597 //TODO: look at architecting cleanest separation between request handler
Me@29 598 // and master loop, for dissipate, create, shutdown, and other non-semantic
Me@29 599 // requests. Issue is chain: one removes requests from AppVP, one dispatches
Me@29 600 // on type of request, and one handles each type.. but some types require
Me@29 601 // action from both request handler and master loop -- maybe just give the
Me@29 602 // request handler calls like: VMS__handle_X_request_type
Me@24 603
Me@29 604
Me@29 605 /*This is called by the semantic layer's request handler when it decides its
Me@29 606 * time to shut down the VMS system. Calling this causes the core loop OS
Me@29 607 * threads to exit, which unblocks the entry-point function that started up
Me@29 608 * VMS, and allows it to grab the result and return to the original single-
Me@29 609 * threaded application.
Me@22 610 *
Me@29 611 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
Me@29 612 * and-wait function has to free a bunch of stuff after it detects the
Me@29 613 * threads have all died: the masterEnv, the thread-related locations,
Me@29 614 * masterVP any AppVPs that might still be allocated and sitting in the
Me@29 615 * semantic environment, or have been orphaned in the _VMSWorkQ.
Me@29 616 *
Me@53 617 *NOTE: the semantic plug-in is expected to use VMS__malloc to get all the
Me@29 618 * locations it needs, and give ownership to masterVP. Then, they will be
Me@53 619 * automatically freed.
Me@22 620 *
Me@29 621 *In here,create one core-loop shut-down processor for each core loop and put
Me@31 622 * them all directly into the readyToAnimateQ.
Me@29 623 *Note, this function can ONLY be called after the semantic environment no
Me@29 624 * longer cares if AppVPs get animated after the point this is called. In
Me@29 625 * other words, this can be used as an abort, or else it should only be
Me@29 626 * called when all AppVPs have finished dissipate requests -- only at that
Me@29 627 * point is it sure that all results have completed.
Me@22 628 */
Me@22 629 void
Me@53 630 VMS__shutdown()
Me@8 631 { int coreIdx;
Me@14 632 VirtProcr *shutDownPr;
Me@22 633
Me@29 634 //create the shutdown processors, one for each core loop -- put them
Me@31 635 // directly into the Q -- each core will die when gets one
Me@8 636 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@50 637 { //Note, this is running in the master
Me@29 638 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
Me@55 639 writeVMSQ( shutDownPr, _VMSMasterEnv->readyToAnimateQs[coreIdx] );
Me@8 640 }
Me@22 641
Me@12 642 }
Me@12 643
Me@12 644
Me@29 645 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
Me@29 646 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
Me@29 647 *This function has the sole purpose of setting the stack and framePtr
Me@29 648 * to the coreLoop's stack and framePtr.. it does that then jumps to the
Me@29 649 * core loop's shutdown point -- might be able to just call Pthread_exit
Me@30 650 * from here, but am going back to the pthread's stack and setting everything
Me@29 651 * up just as if it never jumped out, before calling pthread_exit.
Me@29 652 *The end-point of core loop will free the stack and so forth of the
Me@29 653 * processor that animates this function, (this fn is transfering the
Me@29 654 * animator of the AppVP that is in turn animating this function over
Me@29 655 * to core loop function -- note that this slices out a level of virtual
Me@29 656 * processors).
Me@29 657 */
Me@29 658 void
Me@29 659 endOSThreadFn( void *initData, VirtProcr *animatingPr )
msach@71 660 {
msach@75 661 #ifdef SEQUENTIAL
msach@75 662 asmTerminateCoreLoopSeq(animatingPr);
msach@75 663 #else
msach@71 664 asmTerminateCoreLoop(animatingPr);
msach@75 665 #endif
Me@30 666 }
Me@29 667
Me@29 668
Me@53 669 /*This is called from the startup & shutdown
Me@24 670 */
Me@24 671 void
Me@53 672 VMS__cleanup_at_end_of_shutdown()
Me@31 673 {
msach@78 674 //unused
msach@78 675 //VMSQueueStruc **readyToAnimateQs;
msach@78 676 //int coreIdx;
msach@78 677 //VirtProcr **masterVPs;
msach@78 678 //SchedSlot ***allSchedSlots; //ptr to array of ptrs
Me@31 679
Me@65 680 //Before getting rid of everything, print out any measurements made
msach@69 681 forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, (DynArrayFnPtr)&printHist );
msach@78 682 forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, (DynArrayFnPtr)&saveHistToFile);
msach@143 683 forAllInDynArrayDo( _VMSMasterEnv->measHistsInfo, &freeHist );
Me@65 684 #ifdef MEAS__TIME_PLUGIN
Me@68 685 printHist( _VMSMasterEnv->reqHdlrLowTimeHist );
msach@84 686 saveHistToFile( _VMSMasterEnv->reqHdlrLowTimeHist );
Me@68 687 printHist( _VMSMasterEnv->reqHdlrHighTimeHist );
msach@79 688 saveHistToFile( _VMSMasterEnv->reqHdlrHighTimeHist );
Me@68 689 freeHistExt( _VMSMasterEnv->reqHdlrLowTimeHist );
Me@68 690 freeHistExt( _VMSMasterEnv->reqHdlrHighTimeHist );
Me@65 691 #endif
Me@65 692 #ifdef MEAS__TIME_MALLOC
Me@65 693 printHist( _VMSMasterEnv->mallocTimeHist );
msach@79 694 saveHistToFile( _VMSMasterEnv->mallocTimeHist );
Me@65 695 printHist( _VMSMasterEnv->freeTimeHist );
msach@79 696 saveHistToFile( _VMSMasterEnv->freeTimeHist );
Me@65 697 freeHistExt( _VMSMasterEnv->mallocTimeHist );
Me@65 698 freeHistExt( _VMSMasterEnv->freeTimeHist );
Me@65 699 #endif
Me@65 700 #ifdef MEAS__TIME_MASTER_LOCK
Me@65 701 printHist( _VMSMasterEnv->masterLockLowTimeHist );
Me@65 702 printHist( _VMSMasterEnv->masterLockHighTimeHist );
Me@65 703 #endif
Me@65 704 #ifdef MEAS__TIME_MASTER
Me@65 705 printHist( _VMSMasterEnv->pluginTimeHist );
Me@65 706 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@65 707 {
Me@65 708 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@65 709 //master VPs were created external to VMS, so use external free
Me@65 710 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@65 711
Me@65 712 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@65 713 }
Me@65 714 #endif
Me@65 715 #ifdef MEAS__TIME_STAMP_SUSP
Me@65 716 printHist( _VMSMasterEnv->pluginTimeHist );
Me@65 717 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@65 718 {
Me@65 719 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@65 720 //master VPs were created external to VMS, so use external free
Me@65 721 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@65 722
Me@65 723 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@65 724 }
Me@65 725 #endif
Me@65 726
Me@53 727 //All the environment data has been allocated with VMS__malloc, so just
Me@53 728 // free its internal big-chunk and all inside it disappear.
Me@53 729 /*
Me@31 730 readyToAnimateQs = _VMSMasterEnv->readyToAnimateQs;
Me@31 731 masterVPs = _VMSMasterEnv->masterVPs;
Me@31 732 allSchedSlots = _VMSMasterEnv->allSchedSlots;
Me@31 733
Me@31 734 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
Me@24 735 {
Me@55 736 freeVMSQ( readyToAnimateQs[ coreIdx ] );
Me@50 737 //master VPs were created external to VMS, so use external free
Me@53 738 VMS__dissipate_procr( masterVPs[ coreIdx ] );
Me@31 739
Me@31 740 freeSchedSlots( allSchedSlots[ coreIdx ] );
Me@24 741 }
Me@31 742
Me@53 743 VMS__free( _VMSMasterEnv->readyToAnimateQs );
Me@53 744 VMS__free( _VMSMasterEnv->masterVPs );
Me@53 745 VMS__free( _VMSMasterEnv->allSchedSlots );
Me@50 746
Me@50 747 //============================= MEASUREMENT STUFF ========================
Me@50 748 #ifdef STATS__TURN_ON_PROBES
Me@53 749 freeDynArrayDeep( _VMSMasterEnv->dynIntervalProbesInfo, &VMS__free_probe);
Me@50 750 #endif
Me@50 751 //========================================================================
Me@53 752 */
Me@53 753 //These are the only two that use system free
Me@53 754 VMS_ext__free_free_list( _VMSMasterEnv->freeListHead );
Me@53 755 free( (void *)_VMSMasterEnv );
Me@24 756 }
Me@24 757
Me@54 758
Me@54 759 //================================
Me@54 760
Me@54 761
Me@54 762 /*Later, improve this -- for now, just exits the application after printing
Me@54 763 * the error message.
Me@54 764 */
Me@54 765 void
Me@54 766 VMS__throw_exception( char *msgStr, VirtProcr *reqstPr, VMSExcp *excpData )
Me@54 767 {
msach@69 768 printf("%s",msgStr);
Me@54 769 fflush(stdin);
Me@54 770 exit(1);
Me@54 771 }
Me@54 772